Hybrids are becoming more and more popular yet many shops are not keeping up with training. A lot of the hybrid specific problems need a a Toyota enhanced scan tool to properly diagnose problems with the hybrid system. Are there any independent Toyota Repair specialty repair shops in your area? Call them ask them ift hey are confident in diagnosing this kind of problem or are you best going to the dealer?
Not every Hybrid repair or maintenance has to be done by the dealer. There are a lot of shops keeping up with technology and training.